I wanted to set up a 10 gallon brackish tank. I wanted to have red clawed crabs, but I don't know what type of fish I could put in it. I know mollies like brackish water but I already have a 30 gallon community tank with mollies, so I wanted something different. I did some research on it and it seems like a 10 gallon is going to be on the small side for a brackish tank. Any suggestions on fish or other critters that would be happy in a 10 gallon along with crabs?